<template>
  <div>
    <el-upload
      class="avatar-uploader"
      action="#"
      :on-change="handleRemove"
      :show-file-list="false"
      :before-upload="beforeAvatarUpload"
    >
      <img v-if="imageUrl" :src="imageUrl" class="avatar" alt="">
      <i v-else class="el-icon-plus avatar-uploader-icon"></i>
    </el-upload>
  </div>
</template>

<script>

export default {
  name: 'UploadImg',
  data() {
    return {
      imageUrl: '',
      show: false,
      percentage: 0,
    }
  },
  methods: {
    handleRemove(file) {
      const reader = new FileReader();
      reader.readAsDataURL(file.raw); // 一定要传入file格式
      reader.onload = () => {
        this.imageUrl = reader.result
      };
      reader.onerror = function(error) {
        console.log("Error: ", error);
      };
    },

    beforeAvatarUpload(file) {
      const isJPG = file.type === 'image/jpeg'
      const isLt2M = file.size / 1024 / 1024 < 2

      if (!isJPG) {
        this.$message.error('上传头像图片只能是 JPG 格式!')
      }
      if (!isLt2M) {
        this.$message.error('上传头像图片大小不能超过 2MB!')
      }
      return isJPG && isLt2M
    }

  }
}
</script>

<style>
.avatar-uploader .el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.avatar-uploader .el-upload:hover {
  border-color: #409EFF;
}
.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 178px;
  height: 178px;
  line-height: 178px;
  text-align: center;
}
.avatar {
  width: 178px;
  height: 178px;
  display: block;
}
.progress {
  position: absolute;
  display: flex;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #e4e4e4;
  border-radius: 50%;
  opacity: 0.9;
}
</style>
